Bell-ringer resistance unit



UNITED STATES PATVENT OFFICE.

BELL-RINGER RESISTANCE UNIT.

Application flled February 4, 1921.

To all 'whom t 'may Gomera:

Be it known that I, JAooB CHoDRow, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Bell-Ringer Resistance Units, of which the following is a specification.

This invention relates to a bell ringing resistance unit which can be connected in series with power service lines and a door bell or like equipment requiring a reduced current.

The invention comprises primarily a pair of non-inductive units of comparatively high resistance adapted to be' connected, one end of each to service lines and the other ends with a bell. It has been found that the spark at theinterrupter contacts of the bell is substantially eliminated in employing such resistance units which are shown in the accompanying drawings and described in the following specfication.

Referring to the drawings forming a part of this specification like characters of reference designate corresponcling parts throughout the several views, in which,-

Figura 1 is a perspective view of a bell ringer resistance unit constructed in accordance with this invention,

F ig. 2 is a plan view thereof, with the cover removed so as to show the relative position of the two resistances, and with parts broken away,

Fig. 3 is a transverse| sectional view thereof and l5`ig. 4 is a diagrammatic representation of the unit as connected for use.

' Referring to the drawings, the reference numeral 10 generally designates the unit comprising base and cover members, 11 and 12, made of an insulating material such as porcelain.

The base member 11 is provided with parallel Channels 13 and 14, and terminals such as 15 and 16 extend through the ends of the base from the Channels serving as conductors and connecting means with the circuit in which the unit is to be used.

Suitableresistance material, or elements, such as metal filings, (a mixture of iron, copper and brass has been found very satisfactory), are placed in the Channels 13 and 14,-as indicated at A, to such a depth Specfication of Letters Fatent.

Patented Nov. 22, 1921.

SeriaI No. 442,524.

as to furnish the proper resistance between the terminals 15 and 16. The Channels are then sealed with insulators B, such as sealing-wax, plaster of Paris, or the like, which will maintain the resistance material in place.

A cover 12 may then be fastened over the channels, and by means of screws passing through apertures 17, the unit can be secured to a wall.

Fig.. 4 is a diagrammatic representation of a unit 10 connected with a power or lighting circuit C and a bell D. The circuit through the' bell is completed by closing a switch E which can be of the usual push button type. If a unit is used with a single resistance in the circuit, it is obvious that it would be connected with the bell and switch in series across the power circuit. However the form and connection shown in the drawings are preferred as a resistance is connected with each of the power lines which is especially desirable.

By varying the resistance between the terminals 15 and 16, the units may be made for use in connection with circuits of different voltages, 110 or 220 volt circuits etc., and units can also be made with greater or less resistances adapting them for use as rheostats to be connected with other instruments as well as bells. Different types of terminals may be used and they can be arranged so as to extend upwardly from the unit as represented in the diagram in Fig. 4.

Other changes in details, proportions, and arrangement of parts may be resorted to within the scope of my invention as claimed. l/Vhat I claim as my invention and desire to secure by Letters Patent is:

l. A resistance unit comprising a base member of insulating material having a longitudinal channel therein, conductor terminals extending from each end of the channel, resistance material in the space between said terminals in the channel and means extending over the resistance material longitudinally of the channel for holding the resistance material therein.

2. A resistance unit comprising a base member of insulating material having a lon gitudinal channel therein, conductor terminals extending from each end of the channel, resistance material in the space between said terminals in the channel, means for sealing said resistance material in place therein, and a cover member extending over the base member and resistance elements.

3. A bell ringer resistance unit comprising a base member of` insulating material having a pair of channels therein, conductor terminals extencling from the ends of the channels, and resistance material in the space between said terminalsv in each of the channels. a

4. A bell ringer resistance unit comprising a base member of insulating material having a pair of parallel channels therein extending longituclinally of the base, concluctor terminals extending from each channel through the ends of the base, resistance 'material in the space between said terminals in each of the channels, and means for sealing the resistances in place therein.

5. In combination with a relatively high potential power circuit, a resistance7 unit 'comprising a block of insulating material incasing a pair of non-inductive resistance elements arranged in parallel relation with each other, and having one end thereof connected with the power-Circuit and the other end with low potential electric apparatus for supplyingthe same with a reduced current.

6., A bell ringer resistance unit comprising va base member having longitudinal parallel channels therein, conductor terminals extending through the base from the ends of each of the channels, resistance material in each channel between saidV terminals, and a cover member adapted to be positioned on the base member over the p channels, the base and cover members each having alined apertures'whereby the 'unit may be properly secured to a wall.

7. A resistance unit comprising a base i member of insulating material having a channel therein, conductor terminals ex'- tending from the ends of the channel, a resistance material composed of metallic filines in the channel between said terminals,

and an insulating material in the channel over said resistance material for maintaining the same in place therein.

In testimony whereof I aflix my signature..

JAooB cHoDRow. w 

